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| 研究生： |
周俊融 Chou, Chun-rong |
|---|---|
| 論文名稱： |
剪力片接頭於高溫下之破壞分析 The Failure Analyses of Shear Tab Connections at High Temperatures |
| 指導教授： |
鍾興陽
Chung, Hsin-yang |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年： | 2009 |
| 畢業學年度： | 97 |
| 語文別： | 中文 |
| 論文頁數： | 190 |
| 中文關鍵詞： | 剪力片接頭 、有限元素法 、高溫 、懸垂效應 、受力角度 、破壞模式 |
| 外文關鍵詞： | Shear Tab Connection, Finite-Element Method, High Temperature, Catenary Effect, Force Angle, Failure Mode |
| 相關次數： | 點閱：100 下載：5 |
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本論文利用三維非線性有限元素程式來研究鋼結構接合經常使用的剪力片接頭於高溫下之破壞模式與強度變化。由於鋼梁構件在火害升溫過程中的懸垂效應與降溫過程中的收縮效應，使得剪力片接頭在高溫下受到不同於常溫時垂直向角度的施力，因而發生不同於常溫時的破壞模式。本研究將探討剪力片接頭在不同高溫下受到不同角度的拉力作用下剪力片接頭的強度與破壞模式變化；此外，本研究亦將比較耐火鋼與普通鋼剪力片在高溫行為的差異。透過三維非線性有限元素分析所得之剪力片接頭在不同高溫與不同施力角度的強度結果將與AISC-LRFD之公式解做比較，以檢驗AISC-LRFD公式對於剪力片接頭在高溫下受到不同角度施力作用時的適用性，而由角度與強度關係圖發現，當受力角度改變時，剪力片的強度以及破壞模式會有所不同，而且發生極值(極大值或極小值)的角度通常也是破壞模式轉換之角度。
This thesis utilized a three-dimensional nonlinear finite-element program to study the failure modes and strength variations of the commonly used shear tab connections in steel framing at high temperatures. Due to the catenary effect of steel beam members in the temperature rising process and the shrinkage effect of steel beam members in the temperature decreasing process, the shear tab connections are subjected to the forces different from the vertical shear forces at ambient temperature and having the failure modes different from those at ambient temperature. This research studied the strength and failure mode variations of the shear tab connections at various high temperatures and various force angles of tensile loads, and also compared the high temperature structural behaviors of shear tab connections using fire-resistant steel and normal structural steel. The three-dimensional nonlinear finite-element results will be compared with the results computed from AISC-LRFD formulas to examine the feasibility of using AISC-LRFD formulas to evaluate the strengths of shear tab connections subjected to the tensile loads of various force angles at high temperatures. The force angle-strength diagrams show that the strengths and failure modes of shear tab connections change with the force angles, and the force angle corresponding to the maximum or minimum strength in the force angle-strength diagrams is usually the angle of failure mode transition.
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校內：2014-08-28公開校外：2019-08-28公開